Added ability to ungroup speakers with "unjoin" method
Add 'meta' parameter to play_uri to allow track metadata to be set.
This is required:
a) to stop funky urls being shown in controller apps as the currently playing track when a full url is suppolied
b) to enable playback of favourite radio stations - there is a long winded way of doing this that does not always work, and a shorter, easier and more reliable way of doing it but you need to set the metadata.
I have some rough example usage code can be made available.
Example for radio playback using favourites
Merge https://github.com/phut/SoCo